Scientific Angler Sonar Stillwater Float Freshwater Fly Line
The new Sonar Stillwater Float Freshwater Fly Line from Scientific Anglers is designed for fishing flies near the surface, or with indicators. With a head total length of 45′ and a rear loaded taper, this line is ideal for turning over streamers, nymphs and indicators over distance on a trout lake. This line is overweighted by two line weights for multi-fly setups, long leaders, and longer casts. Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability.
- Designed specifically for the demands of stillwater anglers
- Full floating line for fishing at or near the surface, as well as when fishing with an indicator
- Overweighted by two line weights
- AST+ Slickness
- Improved Dry Tip
| Specification | Detail |
|---|---|
| Head Total Length | 45′ |
| Line Weight Overweight | Two line weights |
| Line Type | Float line |
| Key Feature | AST+ Slickness additive |
FAQ
What makes this fly line suitable for stillwater fishing?
The line is specifically designed for stillwater conditions with a full floating profile and improved dry tip, allowing it to perform well when fishing at or near the surface, or with indicators.
Is the line suitable for long casts and multi-fly setups?
Yes, the line is overweighted by two line weights, which enhances performance in long casts and supports multi-fly setups with long leaders.
What is the AST+ Slickness additive used for?
The AST+ Slickness additive improves shooting ability and increases durability, helping the line maintain performance under various fishing conditions.


Angela Miller –
This line performs well in stillwater conditions. The floating action is smooth and the dry tip stays stable. I’ve used it with both nymphs and streamers and it casts easily over long distances. The AST+ additive makes a noticeable difference in how it moves through the air.
Zoe Underwood –
Great for surface fishing with indicators. The extra weight helps with longer casts and keeps the line from sagging. It’s durable and doesn’t fray easily. A solid choice for trout lakes.
Chloe Lewis –
I’ve switched from a standard float line to this model and noticed a clear improvement in casting accuracy. The improved dry tip keeps the line from dipping too much, and the slickness additive reduces tangles.